Improvement in take-up mechanisms for sewing-machines



N0.- 197,'107. Patented Nov. 13,1877.

@ nlLw lasft b ER, WASHINGTON D C UNITED STATES PATENT OFFICE.

CYRUS S. OUSHMAN, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO I v INESBITT D. STOOPS, OF SAME PLACE.

' IMPROVEMENT m TAKE-UP MECHANISMS FOR SEWING-MACHINES.

Specification forming part of Letters Patent No. 197,107, dated November13, 1877 application filed October 18, 1877.

This invention relates to certain improvements in take-ups forsewing-machines; and

it has for its object to provide simple and efficient mechanism for thatpurpose, which will operate with but little friction and noise, and bymeans of which a positive motion may be transmitted to the same.

To this end my invention consists in the combination, with thebell-crank take-up lever, of a bell-crank lever pivoted within theupright part of the standard which carries the upper works, one end ofsaid lever being connected, by means of a rod, to the bell-crank lever,and the other with an eccentric on the driving-shaft of the machine bymeans of a downwardly-extending rod, having the eccentric strap at itslower end, as more fully hereinafter specified.

My invention further consists in the combition, with the take-up, of asupplementary takeup, consisting of a spring secured to the takeuplever, and working across the thread-slot in said take-up lever, wherebythe thread is held tight until the eye of the needle reaches the fabric.

In the drawings, Figure 1 represents a side elevation of a sewingmachine, with parts broken away to show the take-up mechanism. Fig. 2represents a detached view of the eccentric rod and bell-crank lever, bymeans of which the motion is imparted to the take-up; and Fig. 3represents a detached View of the takeup lever.

The letter E represents the oscillating lever,-

which actuates the needle-bar, pivoted near the rear end of thestandard, and connected,

by a ball-and-socket joint, F, at its rear extremity, to a link, G,which is provided at its lower end with an eccentric strap, H, embracingan eccentric, I, on the driving-shaft, by means of which the propermotions are imparted to the needle-bar and its operating-lever.

The letter K represents the driving-shaft of the machine, journaled inhangers L, depend ing from the bed of the machine. M representsthe-shuttle-driving lever, which is operated by a link, N, connected toa crank, O, on the driving-shaft; and P the feed device, 0peratedbyQeans of an eccentric, R, on the driving-sha t.

The letter A represents the bell-crank takeup lever, pivoted to thefront part of the standard which supports the upper works of themachine, and working through a slot in the front thereof. B representsthe tension device, secured to the front ;of said standard. The long armof the take-up lever is provided with a slot, 0, for the passage of thethread; and to the short or rear arm is connected one end of a link orrod, D, extending backward -to the rear of said standard, its other endbeing pivoted to the upper end of a bell-crank lever, E, pivoted at F tothe upright portion of the standard B, preferably within the same. Theother end of said lever is connected to a downwardly-extending rod orlink, G, preferably by means of a ball-and-socket joint, H. The lowerend of said link is provided with an eccentric strap, I, which embracesan eccentric, K, on the driving-shaft of the machine, by means of whichthe take-up mechanism is operated.

In order to properly form the loop of the needle-thread for the passageof the shuttle, it is necessary that the thread should be held slightlytaut between the take-up and the me dle, for if left slack it is aptto'twist and form into knots, causing breakage of the thread when suchknots reach the eye of the needle. To obviate this the front end of thetake-up lever is provided with a slot, G, and has secured to it aspring, M working across said slot, the front end of said spring belngarranged to work in a guide, M at the front end of the take-up lever.

The thread is passed through the slot 0 above the spring M, and ridesover the upper edge of said spring during the operation of the take-up.

The spring serves to hold the thread with suflicient strain to preventany twisting or knotting while the eye of the needle is above thefabric, but will give sufliciently to allow of the passage of theshuttle through the needle after the eye has passed through said fabric.

By means of my improvement I secure a take-up mechanism that gives apositive motion to the take-up, and which works lightly,

with little friction or noise, thereby materially I to any othersewing-machine; and therefore I do not limit myself to the take-upmechanism in connection with the particular machine described and shown.

I claim, and desire to secure by Letters Patent, is?

1. In combination with the take-up lever, a bell-crank lever pivoted tothe standard which supports the upper works, and an eccentric on thedriving-shaft for operating said lever, the said lever being connectedto the take-up lever by means of a rod or link, and to the eccentric bymeans of a depending rod or link and an eccentric strap, substantiallyas set forth.

2. In combination with the take-up lever, an auxiliary take-up,consisting of a spring secured to the take-up lever, and adapted to workacross the thread-slot in the same, where by the thread is held tightuntil the needle-eye reaches the fabric, substantially as and for thepurposes set forth. y

In testimony that I claim 17.1 8 for goin I have hereunto set my handthe presenafi 0f the subscribing witnesses.

YBUS QUSLHMAN.

Witnesses:

JAMEs L. NORRIS, Jeanne M. WRIGHT, Jr.

